Sphaerocoryne lefevrei, known in Khmer as rumduol/rumdul (រំដួល) and in Thai as lamduan (ลำดวน), is a flowering plant of the Annonaceae family, native to Southeast Asia.

[2] The lamduan was for a long time known in Thailand by the scientific name Melodorum fruticosum, but the name was later identified as a synonym of Uvaria siamensis, a similar but different plant[3] known in Thai as nom maew.

[3] In Cambodia, the rumduol has been referred to by the scientific name Mitrella mesnyi,[4] which most authorities report as an illegitimate synonym of S. affinis.

[5] The tree is widely cultivated as an ornamental plant in Cambodia and Thailand, and its flowers are admired for their pleasant fragrance, which is emitted especially in the evening.

[4] The rumduol/lamduan's distinctive flowers are commonly evoked as a symbol,[2] and have long been used as a metaphor for women's beauty in Khmer and Thai literature.